PicMix'ing Editor is a fun photo application, that mixes pictures with backgrounds.
You can create photo mixes using provided thematic designs or create your own out of photos using a heart, rectangle/square or a circle shape. Take a photo or choose a picture you already have taken, then select design's category by < > buttons and click on the desired design. You can adjust your picture in current design by dragging and two fingers resizing. After you are ready with your pic mix, it is saved to your DCIM folder. You can also post it wherever you want.
PicMix'ing Editor is absolutely free!